JP4243664B2

JP4243664B2 - Method and device for collecting filling material in underground hole

Info

Publication number: JP4243664B2
Application number: JP24697599A
Authority: JP
Inventors: 孝行朝井
Original assignee: Mitani Sekisan Co Ltd
Current assignee: Mitani Sekisan Co Ltd
Priority date: 1999-09-01
Filing date: 1999-09-01
Publication date: 2009-03-25
Anticipated expiration: 2019-09-01
Also published as: JP2001073360A

Description

【０００１】
【発明の属する技術分野】
この発明は、杭の施工などにおいて、地盤を掘削した際に、その掘削孔に充填されたセメントミルクなどの充填物を採取する方法及び装置に関する。
【０００２】
【従来の技術】
杭を施工する場合、地盤を掘削して掘削孔を形成し、掘削孔内に既製杭を埋設していた。この場合、一の方法では掘削孔内にセメントミルク類を注入して、掘削孔内の泥水と置換して、既製杭を沈設し、他の方法では、掘削孔内に注入したセメントミルク類と掘削孔内の掘削土とを撹拌混練してソイルセメント化して既製杭を沈設していた。
【０００３】
この場合、掘削孔内の充填物であるセメントミルクやソイルセメントは施工される杭の支持力判定の重要な要素となっており、その性質を検査することが重要となっていた。
【０００４】
従来の採取方法としては、掘削孔にセメントミルクを注入する前に、プラント等で採取したセメントミルクを検査用の資料として採用していた。また他の採取方法では、掘削孔にセメントミルクを注入した後、既製杭を沈設既製杭の中空孔等を通して、掘削孔からオーバーフローしたセメントミルクを資料として採用していた。そして、これらの資料を基にして圧縮強度試験等を行っていた。
【０００５】
【発明が解決しようとする課題】
前記従来の技術の内、前者の方法は、そもそも地中内に充填されたセメントミルクは、地中内の掘削土等と混ざってしまうため、プラントから採取したものとは質的にも強度的にも相違が生じる。また、後者の掘削孔からオーバーフロ−したセメントミルクを採取した場合、該オーバーフローしたセメントミルクは掘削孔内の上層部より溢れ出てきただけであり、係る資料により掘削孔内下層部のセメントミルクの強度管理は難しかった。
【０００６】
その他の採取方法として、特開昭５４−１５４１１０号「杭の支持力判定方法」が提案されているが、この方法であると、杭中空部内に資料採取用のパイプを組み込んでいるため、セメントミルクが充填された杭孔内に該採取用パイプ付きの杭を挿入したときに、上層と下層の比重の違うセメントミルクが混ざるおそれがある。しかも、所望の採取区間で任意に採取することができない問題点があった。
【０００７】
【課題を解決するための手段】
然るにこの発明では、密封容器を孔底に押し当てて、地中孔内の充填物の任意の採取位置で密封容器の開口を開き、充填物を密封容器内に取り入れ密封するので、前記問題点を解決した。
【０００８】
即ち、この採取方法の発明は、以下のように構成したことを特徴とする地中孔内充填物の採取方法である。
(1) 予め孔底から充填物の採取位置までの長さに応じて採取装置を調整し、
(2) 地中孔内の充填物の採取位置まで、非押圧状態で開口を塞いだ密封容器を有する前記採取装置を、オーガのロッドの下端に連結して降下させ、前記地中孔底の支持地盤に前記採取装置を定着させ、
(3) 前記オーガで前記採取装置を押圧することにより、地中孔底の支持地盤に前記採取装置を押圧して、
(4) 前記採取装置を押圧することにより、前記密封容器の開口を開き、充填物を前記密封容器内に取り入れ、次に前記オーガの押圧を解除することにより、前記開口を閉じて充填物を密封して、
(5) (4)に代わり、前記採取装置を押圧しながら一方向に回転することにより、前記密封容器の開口を開き、充填物を密封容器内に取り入れ、次に前記オーガを押圧したまま他方向に回転することにより前記開口を閉じて充填物を密封して、
(6) (4)または(5)の工程を完了した後、前記採取装置を引き上げる。
また、採取装置の吐出口から採取した充填物に対応した吐出物を放出する地中内充填物の採取方法である。
【０００９】
また、採取装置の発明は、採取物を収容するホッパーに開口内窓を形成し、該ホッパーに、前記開口内窓を塞ぐと共に上下に摺動して開口内窓を露出させることができる外枠を嵌装し、前記外枠の下端に長さ調節自在の孔底押圧部を形成し、前記ホッパーの上端部に、ロッドの連結部を形成し、前記ホッパーと前記外枠との間に、非押圧状態で前記開口内窓を塞ぐように付勢されたスプリングを介装してなる採取装置であって、前記スプリングは、該採取装置を孔底に定着して支持地盤に押圧することにより、開口内窓を開くように形成したことを特徴とする地中内充填物の採取装置である。また、ホッパーを外枠から取り外し可能とし、前記ホッパー外面と前記外枠内面との間に潤滑剤を介在させた地中内充填物の採取装置である。
【００１０】
また、採取装置の他の発明は、採取物を収容するホッパーに開口内窓を形成し、該ホッパーに、前記開口内窓を塞ぐと共に回動摺動して開口内窓を露出させることができる外筒を嵌装し、前記ホッパーの下端に長さ調節自在の孔底押圧部を形成し、前記外筒の上端部に、ロッドの連結部を形成し、前記ホッパー又は前記外筒に、開口内窓閉塞位置と開口内窓露出位置で前記外筒の回動を規制するストッパーを設けたことを特徴とする地中内充填物の採取装置である。ホッパーの外面と外筒の内面との間に潤滑剤を介在させ、外筒の天板に、該潤滑剤の注入口を設けた地中内充填物の採取装置である。
【００１１】
また、前記両採取装置の発明において、地上から供給される補充物の吐出口を設けた地中内充填物の採取装置である。更に、ホッパーの下端部に、採取物の取出口を設けた地中内充填物の採取装置である。
【００１２】
前記において「地中内充填物」とは、既製杭や現場造成杭等の施工において掘削した杭孔内の掘削泥土、セメントミルク類（杭周固定液、根固め液、コンクリート）、またはこれらを撹拌混合したソイルセメント等を指す。また、各種地盤改良工法において、掘削した孔内の充填物を指す。
【００１３】
【発明の実施の形態】
ホッパー１は、有頂角筒状で、側板に内窓５を有し、下端部にハッチ８付きの取出口７が形成されている（図２）。ホッパー１の天板２にオーガーのロッド３７との連結できる連結軸１０が突設され、連結軸１０にセメントミルクなどを地上から吐出できる吐出弁１３が取り付けてある（図１（ａ））。
【００１４】
ホッパー１の外周に、上下に摺動できる外枠１７を嵌装する。外枠１７の側面の外板１９に、ホッパー１の内窓５に対応した外窓２３を穿設し、外枠１７の摺動で、外窓２３と内窓５が連通開口し、あるいは内窓５を外板１９で塞ぐことができる。
【００１５】
連結軸１０に、外枠１７に対してホッパー１を上方に付勢するスプリング１５を介装して採取装置２６を構成する（図１（ａ））。通常位置（スプリング１５が伸びた状態）で、ホッパー１の内窓５は外枠１７の外板１９に塞がれ（図１（ａ）（ｃ））、スプリング１５に抗して矢示４４方向（下方）に押圧すれば、ホッパー１の内窓５は外窓２３に一致して、ホッパー１は開口する（図１（ｂ）（ｄ））。
【００１６】
【実施例１】
図１〜５に基づきこの発明の実施例を説明する。
【００１７】
（Ａ）採取装置
天板２を有する角筒状で、一側壁３に内窓（開口内窓）５が穿設されて、ホッパー１を構成する（図２）。前記ホッパー１は下端部６は細径に絞られ、取出口７を形成し、該取出口７は開閉自在のハッチ８で塞がれている。
【００１８】
前記ホッパー１の天板２上に、上端部にオーガーのロッド３７との連結部１２を有する連結軸１０が突設されている。前記連結軸１０は、ロッド３７の中空部３８に連通できる中空部１１を有し、中間部に地上から操作できる吐出弁１３が前記中空部１１に連通して外面側に向けて取り付けてある（図１（ａ））。
【００１９】
前記ホッパー１の外側四隅部に、断面Ｌ字状の鋼材からなる柱１８、１８を配置し、該柱１８、１８間で、柱１８、１８の外面に、ホッパー１の対向する２側面を被う外板１９、２０を夫々固定して、前記柱１８、１８の上端部に天板２１を、下端に底板２２を夫々連結固着して外枠１７を構成する。前記外枠１７内で前記ホッパー１が上下に摺動できるように形成されている。前記外板１９、２０の内、一方の外板１９は前記ホッパー１の内窓５に対応した外窓２３を有し、他方の外板２０は外窓を形成しない。また、前記外枠１７の天板２１の中央に貫通孔が穿設され連結軸が貫通し、天板２１の下面に連結軸１０の摺動を案内する案内筒２４が固着されている。
【００２０】
前記外枠１７の下部は、外板１９、２０が形成されない開口部２５が形成され、上昇位置でホッパー１のハッチ８を操作できるようになっている。
【００２１】
前記連結軸１０の中間部（吐出弁の下方）にリング状のストッパー１４を有し、前記連結軸１０で、ストッパー１４と外枠１７の天板２１との間に、スプリング１５を介装する。前記スプリング１５により、ホッパー１は、外枠１７内で上側に位置するように付勢されている。即ち、前記連結軸１０を押圧せず、スプリング１５が伸びた状態で、前記ホッパー１は外枠１７の上側に位置し、ホッパー１の内窓５は外枠１７の外板１９に塞がれている（図１（ａ）（ｃ））。また、前記連結軸１０をスプリング１５に抗して、矢示４４方向（下方）に押圧すれば、前記ホッパー１は外枠１７の下側に位置し、ホッパー１の内窓５は外板１９の外窓２３に一致して、ホッパー１は開口する（図１（ｂ）（ｄ））。
【００２２】
また、前記ホッパー１は外枠１７から取り外し可能に取付られている。また、外枠１７（外板１９、２０、柱１８）の内面とホッパー１との間には、予めグリース（潤滑剤）が塗布されている。
【００２３】
以上のようにして、この発明の採取装置２６を構成する（図１（ａ））。前記において、外板１９、２０は、金属製（鋼材）のホッパー１との摩擦を低減するために樹脂から形成されている。また、前記スプリング１５の押圧力は３００ｋｇ／ｃｍ² 程度に形成されている。
【００２４】
（Ｂ）採取方法
次に、前記実施例に基づく採取装置２６の使用、即ち採取方法の発明の実施例について説明する。
【００２５】
(1) セメントミルクを使用した所定の杭孔掘削方法によって、杭孔２８を掘削し、杭孔掘削しながらあるいは、杭孔掘削後に、セメントミルクを注入し、必要ならば掘削土と撹拌混合して、杭孔２８の拡底部２９に根固め液３１が充填され、軸部３０で該根固め液３１層の上方に杭周固定液３２が充填された杭孔２８を構築する（図３（ａ））。
【００２６】
(2) 地上まで引き上げたオーガーのロッド３７から掘削ヘッドを取り外し、ロッド３７の下端に採取装置２６の連結部１２を連結し、杭孔２８の上方から採取装置２６を杭孔２８内に下降する（図３（ａ）（ｂ））。この状態で、スプリング１５は伸びた状態にあり、ホッパー１の内窓５は外板１９で塞がれているので、ホッパー１内に、杭孔軸部３０に充填されている杭周固定液３２が入り込むおそれはない（図１（ａ）（ｃ））。また、この際、必要ならばオーガ（採取装置２６）に回転を加えながら下降させてもよい。採取装置２６を回転することにより、杭穴２８に挿入する際に、採取装置２６の周面に作用する摩擦を切り、セメントミルク等が充填された杭穴２８内に挿入し易くできる。
【００２７】
(3) 続いて、採取位置である杭孔底３３に、採取装置２６の外枠１７の底板２２が定着したならば、そのまま杭孔底３３に、採取装置６を押しつける。押しつける地盤（杭孔底３３）は支持地盤になっているので、非常に強固な地盤あり、採取装置２６を押さえ付けることにより採取装置２６が杭孔底３３に沈み込むことがない（図３（ｃ）。
【００２８】
このスプリング１５に抗した押さえつけにより、スプリング１５が縮みホッパー１は外枠１７内を下方に摺動し、外窓２３と内窓５とが重なり、杭孔底３３から高さＨ₁ において、ホッパー１内に矢示４５のように根固め液３１が入り込む（図１（ｂ）（ｄ））。
【００２９】
(4) 続いて、オーガの押圧を解除すれば、スプリング１５の反発力によりホッパー１は上方に摺動し、内窓５は外板１９に塞がれて、収容した根固め液３１は密封され、杭孔底３３から高さＨ₁ の高さの充填物を採取できる（図１（ａ）（ｃ））。そのまま採取装置２６を引き上げれば（図３（ｄ））、ホッパー１は密封されたまま地上３５に引き上げできる。この際、必要ならば、オーガー（採取装置２６）を回転しながら引き上げることもできる。また、採取装置２６の側面に突起物が無いので、採取装置の出し入れにより、杭孔２８の充填物（杭周固定液、根固め液）を乱すことがない。
【００３０】
(5) 地上に引き上げた採取装置２６のホッパー１の下方にパレット３９を据えて、ハッチ８を開いて、採取した根固め液（充填物）３１を取り出すことができる（図４）。取り出した根固め液３１は、従来同様に、各種試験用の供試体に供される。
(6) 前記において、根固め液３１を採取したことにより、充填物（根固め液３１、杭周固定液３２）に欠陥が生じる場合には、これを解消する為に、根固め液３１を採取してホッパー１を密封後に、吐出弁１３を開いて地上３５からロッド３７の中空部３８を通してセメントミルク等を杭孔２８内に注入することもできる。
【００３１】
(7) また、杭孔底３３付近から所定高さＨ₂ 付近の杭孔充填物を採取する際には、外枠１７の底板２２の下面に高さＨ₂ に見合った補助脚４１を固定して、採取装置２６を構成する（図５）。この場合には、補助脚４１の下端４２が、杭孔底３３に押圧され、同様に充填物を採取できる。補助脚４１の長さを調節すれば、任意深さの充填物を採取できる。
【００３２】
（Ｃ）他の採取装置
次に、他の採取装置２６の構成について説明する。
【００３３】
前記実施例において、外枠１７の柱１８はＬ字状断面の鋼材としたが、柱１８は、外板１９、２０等を取付けて外枠１７を構成できれば断面形状、材質は問わない（図示していない）。
【００３４】
また、前記実施例において、外枠１７は対向２側面にのみ外板１９、２０を有する枠状としたが、４側面に外板を有する角筒状とすることもできる（図示していない）。
【００３５】
また、前記実施例において、ホッパー１の一側面３にのみ内窓５を形成したが、対向する又は隣接する２つ側面に内窓５、５を夫々形成することもできる。更に、３側面や４側面に内窓５を形成することもできる（いずれも図示していない）。この場合には、外枠１７には、全ての内窓５、５に対応して、各内窓５、５を開閉できる外窓２３付きの外板１９、１９を取付ける。
【００３６】
また、前記実施例において、ホッパー１は角筒状としたが、筒状であれば、３角、６角等の角筒、あるいは円筒とすることもできる。
【００３７】
また、前記実施例において、スプリング１５のバネ押圧力は３００ｋｇ／ｃｍ² としたが、１００〜５００ｋｇ／ｃｍ² の間で適宜選択して使用することができる。５００ｋｇ／ｃｍ² 以上ではオーガーへの負担が大きく、杭孔底３３に採取装置２６がめり込むおそれがあり、１００ｋｇ／ｃｍ² 以下では、採取装置２６の挿入途中で、掘削土やセメントミルク等の抵抗によって外枠１７が摺動して外窓２３と内窓５とが重なるおそれがある。
【００３８】
【実施例２】
図６〜図１０に基づきこの発明の他の実施例を説明する。
【００３９】
（Ａ）採取装置
上部が開放した有底筒状のホッパー５０の側壁５２の上部に、直径対称な位置に内窓５３、５３を開口する。前記ホッパー５０内を上下に仕切る中仕切壁５４に開閉自在の取出口５５を穿設し、該取出口５５に採取物を収容するタンク５６を取付ける。前記タンク５６は、上端を前記取出口５５に密封できる構造であり、下面に排出口５７を有し、排出口５７の開閉を操作する開閉バルブ５８を有する。また、前記ホッパー５０の側壁５２の下部には取出口５５及びタンク５６を操作する為の開口部５９が形成されている。
【００４０】
また、前記ホッパー５０の底板５１の下面に、底板５１と同一平面形状（円盤状）の取付板６１をボルトで着脱自在に取り付ける。前記取付板６１の下面略中心位置に差込棒６２を突設し、該差込棒６２の廻りに半径状で等間隔に突板６３、６３を突設して、孔底押圧部６０を構成する。
【００４１】
前記ホッパー５０の上部に、下方に開口した有頂筒状の外筒６５を、回動自在に摺動できるように嵌装する。前記外筒６５の側壁６７には、前記内窓５３と対応してホッパー５０を開口できる外窓６８、６８を直径対称な位置に形成してある。前記外筒６５の下端には突出片６９が形成されている。前記外筒６５はホッパー５０の周りを回動して、内窓５３、５３を塞ぐ位置と、外窓６８、６８を内窓５３、５３に一致させる位置とを取ることができ、前記ホッパー５０の外壁５２に、前記外筒６５の突出片６９と係止して、両位置を取るように外筒６５の回動を規制するストッパー７０、７０ａを突設する。ストッパー７０は、オーガーを正回転（時計回り）した際に回動を規制して、内窓５３、５３を塞ぐ位置を保持するように作用し、ストッパー７０ａは、オーガーを逆回転（反時計回り）した際に回動を規制して、外窓６８、６８を内窓５３、５３に一致させる位置を保持するように作用する（図６（ａ）（ｂ））。
【００４２】
また、前記外筒６５の下端部内壁に設けた突条又は突起（いずれも図示していない）が、前記ホッパー５０の外壁に当該突条又は突起に対応した溝６４に嵌挿され、ホッパー５０を保持して落下を防止している。また、前記外筒６５の内面と前記ホッパー５０の外面との間には、グリース（潤滑剤）が介在して、回動をスムースにできるようになっており、外筒６５の頂板６６には、グリースを充填補充するための注入口７５が設けられている（図６（ａ）（ｂ））。
【００４３】
また、前記外筒６５の頂板６６の上面に上端部にオーガーのロッド３７との連結部１２を有する連結軸１０が突設されている。前記連結軸１０は、前記実施例１と同様に、ロッド３７の中空部３８に連通できる中空部１１を有し、中間部に地上から操作できる吐出弁１３が前記中空部１１に連通して外面側に向けて取り付けてある（図６（ａ））。前記外筒の上面に連結軸と一体に、該連結軸を補強する補強突板７１、７１を放射状に突設してある（図６（ｂ））。
【００４４】
以上のようにして、この発明の採取装置７２を構成する（図６）。
【００４５】
（Ｂ）採取方法
次に、前記実施例に基づく採取装置７２の使用、即ち採取方法の発明の実施例について説明する。
【００４６】
(1) 実施例１と同様に、セメントミルクを使用した所定の杭孔掘削方法によって、杭孔２８を掘削し、杭孔掘削しながらあるいは、杭孔掘削後に、セメントミルクを注入し、必要ならば掘削土と撹拌混合して、杭孔２８の拡底部２９に根固め液３１が充填され、軸部３０で該根固め液３１層の上方に杭周固定液３２が充填された杭孔２８を構築する（図８（ａ））。
【００４７】
(2) 地上まで引き上げたオーガーのロッド３７から掘削ヘッドを取り外し、ロッド３７の下端に採取装置７２の連結部１２を連結し、杭孔２８の上方から採取装置７２を杭孔２８内に、正回転しながら下降する（図８（ａ）（ｂ））。この際、外筒６５の突出片６９、６９がホッパー５０のストッパー７０に夫々係止し、この状態で、ホッパー５０の内窓５３は外筒６５の側壁６７で塞がれているので、ホッパー５０内に、杭孔軸部３０に充填されている杭周固定液３２が入り込むおそれはない（図７（ｂ））。
【００４８】
(3) 続いて、採取装置７２の孔底押圧部６０が、杭孔底３３に定着したならば、そのまま杭孔底３３に、採取装置７２を押しつけつつ、オーガーを逆回転させて、ホッパー５０を静止させたまま、外筒６５を回動して内窓５３、５３と外窓６８、６８とを一致させる。この際、外筒６５の突出片６９、６９が、ホッパー５０のストッパー７０ａに夫々係止するので、内窓５３と外窓６８とが一致する位置を保つ（図６（ａ）（ｂ））。また、押しつける地盤（杭孔底３３）は支持地盤になっているので、非常に強固な地盤あり、採取装置７２を押さえ付けることにより、採取装置７２の孔底押圧部６０（差込棒６２、突板６３）が杭孔底３３に沈み込み、採取装置７２が空回りすることがない（図８（ｃ））。
【００４９】
外窓６８、６８と内窓５３、５３とが重なることにより、杭孔底３３から高さＨ₃ において、ホッパー５０内に矢示７６、７６のように根固め液３１が入り込む（図７（ａ））。
【００５０】
(4) 続いて、オーガを押圧したまま再び正回転に戻せば、外筒６５が回動して、突出片６９、６９がストッパー７０に夫々係止して、内窓５３は、外筒６５の側壁６６に塞がれて、収容した根固め液３１は密封される（図７（ｂ））。オーガーを正回転した状態で、採取装置７２を引き上げれば（図８（ｄ））、ホッパー５０は密封されたまま地上３５に引き上げできる。また、実施例１の採取装置２６と同様に、採取装置７２の側面に突起物が無いので、採取装置７２の出し入れにより、杭孔２８の充填物（杭周固定液、根固め液）を乱すことなくがない。
【００５１】
(5) ホッパー５０内に収容された根固め液３１は、取出口５５からタンク５６内に収容されており、地上に引き上げた採取装置７２のホッパー５０のタンク５６の排出口５７にホース７３を取り付け、開閉バルブ５８を開いて、ホース７３の先端から採取した根固め液（充填物）３１を取り出すことができる（図９）。取り出した根固め液３１は、従来同様に、各種試験用の供試体に供される。
また、この際、ホッパー５０からタンク５６のみを取り外して、供試体作成位置まで、移動して根固め液３１を取り出すこともできる。
【００５２】
(6) 前記において、根固め液３１を採取したことにより、充填物（根固め液３１、杭周固定液３２）に欠陥が生じる場合には、これを解消する為に、根固め液３１を採取してホッパー５０を密封後に、吐出弁１３を開いて地上３５からロッド３７の中空部３８を通してセメントミルク等を杭孔２８内に注入することもできる。この際に、オーガーを回転しているため、孔底押圧部６０の突板６３、６３により撹拌混練でき、充填物（根固め液３１、杭周固定液３２）の均一をはかることができる。
【００５３】
(7) また、杭孔底３３付近から所定高さＨ₄ 付近の杭孔充填物を採取する際には、ホッパー５０の底板５１から取付板６１（孔底押圧部６０）を外して、底板５１に、高さＨ₄ に見合った補助脚７４をボルトで取り付け、補助脚７４の下面に取付板６１（孔底押圧部６０）を取付けてなる採取装置７２を使用する（図１０）。補助脚７４の長さを調節すれば、任意深さの充填物を採取できる。
【００５４】
（Ｃ）他の採取装置
次に、他の採取装置７２の構成について説明する。
【００５５】
前記実施例において、ホッパー５０に２つの内窓５３を形成したが、１つあるいは３つ以上形成することもできる（図示していない）。この場合には、内窓５３の数と位置に対応して、外筒６５の側壁６７に外窓６８を形成する。
【００５６】
また、前記実施例において、ホッパー５０の取出口５５にタンク５６と取り付けたが、実施例１と同様に、取出口５５にハッチ８を設けることもできる（図示していない）。逆に、実施例１において、ホッパー１の取出口に、実施例２と同様のタンク５６を設けることもできる（図示していない）。
【００５７】
また、前記実施例において、孔底押圧部６０は、差込棒６２と突板６３とを設けたが、杭孔底３３にホッパー５０の下面を押圧して回動した際に、ホッパー５０の回動を摩擦力により阻止できれば、他の形状とすることもできる。例えば、複数の棒状突起物、複数の板状の突起物などから構成することもできる（いずれも図示していない）
また、前記実施例において、オーガーの逆回転によりホッパー５０の内窓５３を開き、正回転により内窓５３を閉じるようにしたが、逆に構成することもできる。この場合には、回転方向に対応して、ストッパー７０、７０ａの取り付け位置を変更する（図示していない）。
【００５８】
【発明の効果】
この発明は、予め孔底から充填物の採取位置までの長さに応じて採取装置を調整し、地中孔底に前記採取装置を押圧して前記密封容器の開口を開き、充填物を密封容器内に取り入れるので、地中充填物を任意の区間で確実に採取することができる。また、予め設定した採取位置に至るまでは、密封容器の開口は開かないので、所望の採取区間に至るまで、あるいは採取後に、密封容器内に他の区間の充填物が混入するおそれがない。
【００５９】
従って、現位置の充填物をそのまま採取できるので、充填物の固化強度その他の性質を正確に把握できる効果がある。
【図面の簡単な説明】
【図１】この発明の実施例１の採取装置で、（ａ）は正面図でホッパーを密封した状態、（ｂ）は同じく正面図でホッパーの内窓を開いた状態、（ｃ）は（ａ）のＡ−Ａ線における断面図、（ｄ）は（ｂ）のＢ−Ｂ線における断面図である。
【図２】ホッパーの拡大正面図でハッチを開けた状態を表す。
【図３】（ａ）〜（ｄ）はこの発明の実施例１の採取方法を説明する一部を省略した縦断面図である。
【図４】この発明の実施例１の採取装置の正面図でホッパーのハッチを開いて、採取物を取り出している状態を表す。
【図５】この発明の実施例１の採取装置で、補助脚を取り付けた状態を表す。
【図６】この発明の実施例２の採取装置で、（ａ）は正面図、（ｂ）は平面図、（ｃ）は底面図である。
【図７】図６（ａ）のＣ−Ｃ線における拡大断面図で、（ａ）は内窓を開いた状態、（ｂ）は内窓を閉じた状態を夫々表す。
【図８】（ａ）〜（ｄ）はこの発明の実施例２の採取方法を説明する一部を省略した縦断面図である。
【図９】この発明の実施例２の採取装置の正面図で、ホッパーから採取物を取り出している状態を表す。
【図１０】この発明の実施例２の採取装置の正面図で、補助脚を取り付けた状態を表す。
【符号の説明】
１ホッパー
２天板（ホッパー）
３側板（ホッパー）
４側板（ホッパー）
５内窓（ホッパー）
７取出口（ホッパー）
８ハッチ（ホッパー）
１０連結軸
１１中空部（連結軸）
１２連結部（連結軸）
１３吐出弁（連結軸）
１４ストッパー（連結軸）
１５スプリング
１７外枠
１９外板（外枠）
２０外板（外枠）
２１天板（外枠）
２２底板（外枠）
２３外窓（外枠）
２６採取装置
２８杭孔
２９拡底部（杭孔）
３０軸部（杭孔）
３３孔底（杭孔）
３５地上
３７ロッド
４１補助脚
５０ホッパー
５１底板（ホッパー）
５２側壁（ホッパー）
５３内窓（ホッパー）
５５取出口（ホッパー）
５６タンク（ホッパー）
６０孔底押圧部（ホッパー）
６５外筒
６７側壁（外筒）
６８外窓（外筒）
６９突出片（外筒）
７０、７０ａストッパー
７２採取装置
７４補助脚[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and an apparatus for collecting a filler such as cement milk filled in an excavation hole when excavating the ground in construction of a pile or the like.
[0002]
[Prior art]
When constructing piles, the ground was excavated to form excavation holes, and ready-made piles were buried in the excavation holes. In this case, in one method, cement milk is injected into the drilling hole and replaced with muddy water in the drilling hole, and a ready-made pile is set down. The excavated soil in the excavation hole was agitated and kneaded to form soil cement, and a ready-made pile was laid.
[0003]
In this case, cement milk and soil cement, which are fillers in the excavation hole, are important elements for determining the bearing capacity of piles to be constructed, and it is important to inspect their properties.
[0004]
As a conventional sampling method, cement milk sampled at a plant or the like before the cement milk was poured into the excavation hole has been adopted as data for inspection. In another sampling method, cement milk overflowed from the excavation hole was used as data after pouring cement milk into the excavation hole and passing through the hollow hole of the ready-made pile. Based on these materials, a compressive strength test was conducted.
[0005]
[Problems to be solved by the invention]
Among the prior arts, the former method is that the cement milk filled in the ground is mixed with excavated soil etc. in the ground, so it is qualitatively and stronger than that collected from the plant. There are also differences. In addition, when overflowing cement milk is collected from the latter excavation hole, the overflowed cement milk has only overflowed from the upper layer portion in the excavation hole. It was difficult to manage the strength.
[0006]
As another sampling method, Japanese Patent Laid-Open No. 54-154110, “Pile bearing capacity judgment method” has been proposed. In this method, since a pipe for collecting data is incorporated in the hollow portion of the pile, cement is used. When a pile with the pipe for collection is inserted into a pile hole filled with milk, cement milk having different specific gravity may be mixed between the upper layer and the lower layer. In addition, there is a problem that it is not possible to arbitrarily collect in a desired collection section.
[0007]
[Means for Solving the Problems]
However, in the present invention, the sealed container is pressed against the bottom of the hole, the opening of the sealed container is opened at an arbitrary sampling position of the filler in the underground hole, and the filler is taken into the sealed container and sealed. Solved.
[0008]
In other words, the invention of the sampling method is a method for sampling the filling in the underground hole, characterized in that it is configured as follows.
(1) Adjust the sampling device according to the length from the hole bottom to the packing sampling position in advance,
(2) Connect the lower end of the auger rod to the sampling device having the sealed container with the opening closed in a non-pressed state to the sampling position of the filling in the underground hole, and lower it so that the bottom of the underground hole Fixing the sampling device on the supporting ground,
(3) By pressing the sampling device with the auger, pressing the sampling device to the support ground at the bottom of the underground hole,
(4) By pressing the sampling device, the opening of the sealed container is opened, the filling is taken into the sealed container, and then the auger is released to close the opening and remove the filling. Sealed
(5) Instead of (4), by rotating the sampling device in one direction while pressing the sampling device, the opening of the sealed container is opened, the filling material is taken into the sealed container, and then the auger is pressed and the other Sealing the filling by closing the opening by rotating in the direction,
(6) After completing the step (4) or (5), the sampling device is pulled up.
Moreover, it is the collection | recovery method of the underground filling which discharges the discharge corresponding to the packing collected from the discharge outlet of the collection device.
[0009]
Further, the invention of the collection device is an outer frame in which an opening inner window is formed in a hopper that accommodates the collected material, and the opening inner window is exposed to the hopper by closing the opening inner window and sliding up and down. The bottom of the outer frame is formed with an adjustable bottom bottom pressing portion, the upper end of the hopper is formed with a connecting portion of the rod, and the hopper and the outer frame are a sampling device formed by interposing a biased spring as a non-pressed state closing the opening window, the spring, by pressing the supporting ground by fixing a blood collection winder bottom of the hole The underground filling material collecting apparatus is characterized by being formed so as to open an opening window . In addition, the underground hopper sampling device is configured such that the hopper can be removed from the outer frame, and a lubricant is interposed between the outer surface of the hopper and the inner surface of the outer frame.
[0010]
According to another invention of the collection device, an opening inner window can be formed in a hopper that accommodates the collected material, and the opening inner window can be exposed to the hopper by closing and rotating the opening window. An outer cylinder is fitted, a hole bottom pressing portion whose length is adjustable is formed at the lower end of the hopper , a connecting portion of a rod is formed at the upper end portion of the outer cylinder, and an opening is formed in the hopper or the outer cylinder. The underground filling material collecting apparatus is characterized in that a stopper for restricting the rotation of the outer cylinder is provided at an inner window closing position and an opening inner window exposure position. An underground filling material collecting apparatus in which a lubricant is interposed between an outer surface of a hopper and an inner surface of an outer cylinder, and an inlet for the lubricant is provided on a top plate of the outer cylinder.
[0011]
Further, in the invention of the both sampling devices, the underground packing material collecting device is provided with a discharge port for replenishment supplied from the ground. Furthermore, it is the underground material collection device which provided the extraction port of the collection material in the lower end part of the hopper.
[0012]
In the above, “underground filling” means excavated mud, cement milk (pile circumference fixing liquid, rooting liquid, concrete) in pile holes excavated in the construction of ready-made piles, site-built piles, or the like. This refers to soil cement that has been mixed with stirring. Moreover, in various ground improvement construction methods, it refers to the filler in the excavated hole.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The hopper 1 has a rectangular tube shape with an inner window 5 on the side plate, and an outlet 7 with a hatch 8 is formed at the lower end (FIG. 2). A connecting shaft 10 that can be connected to the auger rod 37 projects from the top plate 2 of the hopper 1, and a discharge valve 13 that can discharge cement milk or the like from the ground is attached to the connecting shaft 10 (FIG. 1A).
[0014]
An outer frame 17 that can slide up and down is fitted on the outer periphery of the hopper 1. An outer window 23 corresponding to the inner window 5 of the hopper 1 is drilled in the outer plate 19 on the side surface of the outer frame 17, and the outer window 23 and the inner window 5 are opened to communicate with each other by sliding the outer frame 17. The window 5 can be closed with the outer plate 19.
[0015]
A sampling device 26 is configured on the connecting shaft 10 by interposing a spring 15 that biases the hopper 1 upward with respect to the outer frame 17 (FIG. 1A). In the normal position (in a state where the spring 15 is extended), the inner window 5 of the hopper 1 is blocked by the outer plate 19 of the outer frame 17 (FIGS. 1A and 1C), and an arrow 44 against the spring 15 is shown. When pressed in the direction (downward), the inner window 5 of the hopper 1 coincides with the outer window 23, and the hopper 1 opens (FIGS. 1B and 1D).
[0016]
[Example 1]
An embodiment of the present invention will be described with reference to FIGS.
[0017]
(A) A rectangular tube having a sampling device top plate 2, and an inner window (opening window) 5 is formed in one side wall 3 to constitute a hopper 1 (FIG. 2). The lower end portion 6 of the hopper 1 is narrowed to a small diameter to form an outlet 7, which is closed with an openable / closable hatch 8.
[0018]
On the top plate 2 of the hopper 1, a connecting shaft 10 having a connecting portion 12 with an auger rod 37 at the upper end is projected. The connecting shaft 10 has a hollow portion 11 that can communicate with the hollow portion 38 of the rod 37, and a discharge valve 13 that can be operated from the ground is attached to the middle portion and is attached toward the outer surface side. FIG. 1 (a)).
[0019]
Columns 18, 18 made of steel material having an L-shaped cross section are arranged at the outer four corners of the hopper 1, and the two opposite side surfaces of the hopper 1 are covered on the outer surfaces of the columns 18, 18 between the columns 18, 18. The outer plates 19 and 20 are fixed, and the top plate 21 is connected to the upper ends of the pillars 18 and 18 and the bottom plate 22 is connected and fixed to the lower ends to constitute the outer frame 17. The hopper 1 is formed so as to slide up and down within the outer frame 17. One of the outer plates 19, 20 has an outer window 23 corresponding to the inner window 5 of the hopper 1, and the other outer plate 20 does not form an outer window. Further, a through hole is formed in the center of the top plate 21 of the outer frame 17 so that the connecting shaft penetrates, and a guide tube 24 for guiding the sliding of the connecting shaft 10 is fixed to the lower surface of the top plate 21.
[0020]
The lower part of the outer frame 17 is formed with an opening 25 in which the outer plates 19 and 20 are not formed, so that the hatch 8 of the hopper 1 can be operated at the raised position.
[0021]
A ring-shaped stopper 14 is provided at an intermediate portion of the connecting shaft 10 (below the discharge valve), and a spring 15 is interposed between the stopper 14 and the top plate 21 of the outer frame 17 on the connecting shaft 10. . The hopper 1 is urged by the spring 15 so as to be positioned on the upper side in the outer frame 17. In other words, the hopper 1 is positioned above the outer frame 17 with the spring 15 extended without pressing the connecting shaft 10, and the inner window 5 of the hopper 1 is blocked by the outer plate 19 of the outer frame 17. (FIGS. 1A and 1C). If the connecting shaft 10 is pressed against the spring 15 in the direction of arrow 44 (downward), the hopper 1 is positioned below the outer frame 17, and the inner window 5 of the hopper 1 is the outer plate 19. The hopper 1 opens to coincide with the outer window 23 (FIGS. 1B and 1D).
[0022]
The hopper 1 is detachably attached to the outer frame 17. Further, grease (lubricant) is applied in advance between the inner surface of the outer frame 17 (the outer plates 19 and 20 and the column 18) and the hopper 1.
[0023]
As described above, the collection device 26 of the present invention is configured (FIG. 1A). In the above, the outer plates 19 and 20 are made of resin in order to reduce friction with the metal (steel) hopper 1. The pressing force of the spring 15 is about 300 kg / cm ² .
[0024]
(B) Sampling Method Next, the use of the sampling device 26 based on the above embodiment, that is, an embodiment of the invention of the sampling method will be described.
[0025]
(1) Excavate the pile hole 28 by a predetermined method of excavating pile holes using cement milk, inject cement milk while excavating the pile hole or after excavating the pile hole, and mix with the excavated soil if necessary. Thus, a pile hole 28 is constructed in which the bottomed portion 29 of the pile hole 28 is filled with the root-setting liquid 31 and the shaft portion 30 is filled with the pile circumferential fixing liquid 32 above the root-setting liquid 31 layer (FIG. 3 ( a)).
[0026]
(2) The excavation head is removed from the rod 37 of the auger pulled up to the ground, the connecting portion 12 of the sampling device 26 is connected to the lower end of the rod 37, and the sampling device 26 is lowered into the pile hole 28 from above the pile hole 28. (FIG. 3 (a) (b)). In this state, the spring 15 is in an extended state, and the inner window 5 of the hopper 1 is closed by the outer plate 19, so that the pile periphery fixing liquid filled in the pile hole shaft portion 30 is filled in the hopper 1. There is no possibility that 32 enters (FIGS. 1A and 1C). At this time, if necessary, the auger (collecting device 26) may be lowered while rotating. By rotating the sampling device 26, when it is inserted into the pile hole 28, the friction acting on the peripheral surface of the sampling device 26 is cut off and can be easily inserted into the pile hole 28 filled with cement milk or the like.
[0027]
(3) Subsequently, if the bottom plate 22 of the outer frame 17 of the sampling device 26 is fixed to the pile hole bottom 33 which is the sampling position, the sampling device 6 is pressed against the pile hole bottom 33 as it is. Since the ground to be pressed (pile hole bottom 33) is a supporting ground, there is a very strong ground, and the sampling device 26 does not sink into the pile hole bottom 33 by pressing the sampling device 26 (FIG. 3 ( c).
[0028]
By pressing against the spring 15, the spring 15 contracts and the hopper 1 slides downward in the outer frame 17, the outer window 23 and the inner window 5 overlap, and the hopper _{1 at a} height H ₁ from the pile hole bottom 33. As shown by arrow 45, the root-setting liquid 31 enters 1 (FIGS. 1B and 1D).
[0029]
(4) Subsequently, when the auger is released, the hopper 1 slides upward due to the repulsive force of the spring 15, the inner window 5 is closed by the outer plate 19, and the contained root hardening liquid 31 is sealed. Thus, the filling with the height H ₁ can be collected from the pile hole bottom 33 (FIGS. 1A and 1C). If the sampling device 26 is pulled up as it is (FIG. 3D), the hopper 1 can be pulled up to the ground 35 while being sealed. At this time, if necessary, the auger (collecting device 26) can be pulled up while rotating. Moreover, since there is no protrusion on the side surface of the collection device 26, the filling material (pile circumference fixing liquid, root-setting liquid) in the pile hole 28 is not disturbed by taking in and out the collection device.
[0030]
(5) The pallet 39 is placed below the hopper 1 of the collection device 26 pulled up to the ground, and the hatch 8 is opened to extract the collected root-setting liquid (filler) 31 (FIG. 4). The taken-out root hardening liquid 31 is provided to specimens for various tests as in the prior art.
(6) In the above, when the filling (root-setting liquid 31, pile-fixing liquid 32) is defective due to the collection of the root-setting liquid 31, in order to eliminate this, the root-setting liquid 31 is used. After collecting and sealing the hopper 1, the discharge valve 13 is opened and cement milk or the like can be injected into the pile hole 28 from the ground 35 through the hollow portion 38 of the rod 37.
[0031]
(7) Further, when collecting the pile hole filling near the predetermined height H _{2 from the} vicinity of the pile hole bottom 33, the auxiliary leg 41 corresponding to the height H ₂ is fixed to the lower surface of the bottom plate 22 of the outer frame 17. Thus, the collection device 26 is configured (FIG. 5). In this case, the lower end 42 of the auxiliary leg 41 is pressed against the pile hole bottom 33, and the filling material can be similarly collected. If the length of the auxiliary leg 41 is adjusted, a filling material having an arbitrary depth can be collected.
[0032]
(C) Other Collection Device Next, the configuration of another collection device 26 will be described.
[0033]
In the above embodiment, the column 18 of the outer frame 17 is made of a steel material having an L-shaped cross section. However, the column 18 may have any cross-sectional shape and material as long as the outer frame 17 can be configured by attaching the outer plates 19 and 20 or the like (see FIG. Not shown).
[0034]
Moreover, in the said Example, although the outer frame 17 was made into the frame shape which has the outer plates 19 and 20 only on two opposing side surfaces, it can also be made into the square cylinder shape which has an outer plate in four side surfaces (not shown). .
[0035]
Moreover, in the said Example, although the inner window 5 was formed only in the one side 3 of the hopper 1, the inner windows 5 and 5 can also be formed in two opposing side surfaces, respectively. Further, the inner window 5 can be formed on the three side surfaces or the four side surfaces (none of them are shown). In this case, outer plates 19 and 19 with outer windows 23 that can open and close the inner windows 5 and 5 are attached to the outer frame 17 corresponding to all the inner windows 5 and 5.
[0036]
Moreover, in the said Example, although the hopper 1 was made into the square cylinder shape, if it is cylindrical, it can also be made into square cylinders, such as a triangle and a hexagon, or a cylinder.
[0037]
Further, in the above embodiment, the spring pressure of the spring 15 is set to 300 kg / cm ^2, it can be suitably selected between 100 to 500 kg / cm ^2. If it is 500 kg / cm ² or more, the load on the auger is large, and the sampling device 26 may sink into the pile hole bottom 33. If it is 100 kg / cm ² or less, resistance such as excavated soil or cement milk may occur while the sampling device 26 is being inserted. As a result, the outer frame 17 may slide and the outer window 23 and the inner window 5 may overlap.
[0038]
[Example 2]
Another embodiment of the present invention will be described with reference to FIGS.
[0039]
(A) Inner windows 53, 53 are opened at positions symmetric in diameter at the upper part of the side wall 52 of the bottomed cylindrical hopper 50 with the upper part of the sampling device open. An openable / closable outlet 55 is formed in an intermediate partition wall 54 that divides the inside of the hopper 50 up and down, and a tank 56 that accommodates a sample is attached to the outlet 55. The tank 56 has a structure in which an upper end can be sealed to the outlet 55, has a discharge port 57 on a lower surface, and has an opening / closing valve 58 for operating the opening / closing of the discharge port 57. An opening 59 for operating the outlet 55 and the tank 56 is formed in the lower part of the side wall 52 of the hopper 50.
[0040]
Further, a mounting plate 61 having the same plane shape (disk shape) as the bottom plate 51 is detachably attached to the lower surface of the bottom plate 51 of the hopper 50 with a bolt. A hole bottom pressing portion 60 is formed by projecting an insertion rod 62 at a substantially central position on the lower surface of the mounting plate 61, and projecting projection plates 63, 63 at equal intervals around the insertion rod 62. To do.
[0041]
On the upper part of the hopper 50, a cylindrical outer cylinder 65 opened downward is fitted so as to be able to slide freely. On the side wall 67 of the outer cylinder 65, outer windows 68, 68 that can open the hopper 50 corresponding to the inner window 53 are formed at diametrically symmetrical positions. A protruding piece 69 is formed at the lower end of the outer cylinder 65. The outer cylinder 65 can rotate around the hopper 50 to take a position for closing the inner windows 53, 53 and a position for matching the outer windows 68, 68 to the inner windows 53, 53. The outer wall 52 is provided with stoppers 70 and 70 a that are engaged with the protruding pieces 69 of the outer cylinder 65 and restrict the rotation of the outer cylinder 65 so as to take both positions. The stopper 70 restricts the rotation when the auger is rotated forward (clockwise), and acts to hold the position for closing the inner windows 53, 53. The stopper 70a rotates the auger in the reverse direction (counterclockwise). ) Is controlled so as to hold the position where the outer windows 68 are aligned with the inner windows 53 (FIGS. 6A and 6B).
[0042]
Further, a ridge or protrusion (both not shown) provided on the inner wall of the lower end portion of the outer cylinder 65 is fitted into the groove 64 corresponding to the ridge or protrusion on the outer wall of the hopper 50, and the hopper 50 To prevent falling. Further, grease (lubricant) is interposed between the inner surface of the outer cylinder 65 and the outer surface of the hopper 50 so that the rotation can be performed smoothly. An inlet 75 for replenishing and replenishing grease is provided (FIGS. 6A and 6B).
[0043]
Further, a connecting shaft 10 having a connecting portion 12 connected to an auger rod 37 at the upper end portion projects from the upper surface of the top plate 66 of the outer cylinder 65. As in the first embodiment, the connecting shaft 10 has a hollow portion 11 that can communicate with the hollow portion 38 of the rod 37, and a discharge valve 13 that can be operated from the ground at an intermediate portion communicates with the hollow portion 11 and has an outer surface. It is attached toward the side (FIG. 6A). Reinforcing projecting plates 71 and 71 that reinforce the connecting shaft are radially provided on the upper surface of the outer cylinder so as to be integral with the connecting shaft (FIG. 6B).
[0044]
As described above, the collection device 72 of the present invention is configured (FIG. 6).
[0045]
(B) Sampling Method Next, the use of the sampling device 72 based on the above embodiment, that is, an embodiment of the invention of the sampling method will be described.
[0046]
(1) As in Example 1, the pile hole 28 is excavated by a predetermined pile hole excavation method using cement milk, and cement milk is injected while excavating the pile hole or after excavating the pile hole. In this case, the bottomed portion 29 of the pile hole 28 is agitated and mixed with the excavated soil, and the root consolidation liquid 31 is filled in the pile hole 28. Is constructed (FIG. 8A).
[0047]
(2) Remove the excavation head from the auger rod 37 raised to the ground, connect the connecting portion 12 of the sampling device 72 to the lower end of the rod 37, and place the sampling device 72 into the pile hole 28 from above the pile hole 28. It descends while rotating (FIGS. 8A and 8B). At this time, the protruding pieces 69 and 69 of the outer cylinder 65 are respectively engaged with the stoppers 70 of the hopper 50, and in this state, the inner window 53 of the hopper 50 is closed by the side wall 67 of the outer cylinder 65. There is no possibility that the pile circumference fixing liquid 32 filled in the pile hole shaft portion 30 will enter 50 (FIG. 7B).
[0048]
(3) Subsequently, if the hole bottom pressing portion 60 of the collection device 72 is fixed to the pile hole bottom 33, the auger is rotated in the reverse direction while pressing the collection device 72 against the pile hole bottom 33 as it is. The outer cylinder 65 is rotated to keep the inner windows 53 and 53 and the outer windows 68 and 68 coincide with each other while the frame is stationary. At this time, since the projecting pieces 69 and 69 of the outer cylinder 65 are respectively engaged with the stoppers 70a of the hopper 50, the positions where the inner window 53 and the outer window 68 coincide with each other are maintained (FIGS. 6A and 6B). . Further, since the ground to be pressed (pile hole bottom 33) is the supporting ground, there is a very strong ground. By pressing the sampling device 72, the hole bottom pressing portion 60 (insertion rod 62, The protruding plate 63) does not sink into the pile hole bottom 33, and the sampling device 72 does not rotate freely (FIG. 8C).
[0049]
When the outer windows 68 and 68 and the inner windows 53 and 53 overlap, the root-setting liquid 31 enters the hopper 50 as indicated by arrows 76 and 76 at the height H ₃ from the pile hole bottom 33 (FIG. 7 ( a)).
[0050]
(4) Subsequently, when the auger is pressed and returned to the normal rotation again, the outer cylinder 65 is rotated, the protruding pieces 69 and 69 are respectively locked to the stopper 70, and the inner window 53 is connected to the outer cylinder 65. The side wall 66 is closed, and the stored root hardening liquid 31 is sealed (FIG. 7B). If the sampling device 72 is pulled up with the auger rotated in the forward direction (FIG. 8D), the hopper 50 can be pulled up to the ground 35 while being sealed. Moreover, since there is no protrusion on the side surface of the collection device 72 as in the collection device 26 of the first embodiment, the filling (pile circumference fixing liquid, root-setting liquid) in the pile hole 28 is disturbed by taking in and out the collection device 72. There is nothing without it.
[0051]
(5) The root hardening liquid 31 accommodated in the hopper 50 is accommodated in the tank 56 from the outlet 55, and the hose 73 is connected to the discharge port 57 of the tank 56 of the hopper 50 of the sampling device 72 pulled up to the ground. The rooting liquid (filler) 31 collected from the tip of the hose 73 can be taken out by attaching and opening the open / close valve 58 (FIG. 9). The taken-out root hardening liquid 31 is provided to specimens for various tests as in the prior art.
At this time, it is also possible to remove only the tank 56 from the hopper 50 and move to the specimen creation position to take out the root-setting liquid 31.
[0052]
(6) In the above, when the filling (root-setting liquid 31, pile-fixing liquid 32) is defective due to the collection of the root-setting liquid 31, in order to eliminate this, the root-setting liquid 31 is used. After collecting and sealing the hopper 50, the discharge valve 13 is opened and cement milk or the like can be injected into the pile hole 28 from the ground 35 through the hollow portion 38 of the rod 37. At this time, since the auger is rotating, stirring and kneading can be performed by the projecting plates 63 and 63 of the hole bottom pressing portion 60, and the filling (root-setting liquid 31 and pile circumference fixing liquid 32) can be made uniform.
[0053]
(7) In addition, when collecting a predetermined height H ₄ Pile hole filling near the vicinity Kuianasoko 33, remove the mounting plate 61 (bottom hole pressing portion 60) from the bottom plate 51 of the hopper 50, the bottom plate 51, a sampling device 72 is used in which an auxiliary leg 74 corresponding to the height H ₄ is attached with a bolt, and an attachment plate 61 (hole bottom pressing portion 60) is attached to the lower surface of the auxiliary leg 74 (FIG. 10). By adjusting the length of the auxiliary leg 74, it is possible to collect a filling material having an arbitrary depth.
[0054]
(C) Other Collection Device Next, the configuration of another collection device 72 will be described.
[0055]
In the above embodiment, the two inner windows 53 are formed in the hopper 50. However, one or three or more windows may be formed (not shown). In this case, the outer window 68 is formed on the side wall 67 of the outer cylinder 65 corresponding to the number and position of the inner windows 53.
[0056]
Moreover, in the said Example, although the tank 56 was attached to the taking-out port 55 of the hopper 50, the hatch 8 can also be provided in the taking-out port 55 similarly to Example 1 (not shown). Conversely, in the first embodiment, a tank 56 similar to that in the second embodiment can be provided at the outlet of the hopper 1 (not shown).
[0057]
In the above-described embodiment, the hole bottom pressing portion 60 is provided with the insertion rod 62 and the protruding plate 63, but when the bottom surface of the hopper 50 is rotated against the pile hole bottom 33 and rotated, If the movement can be prevented by the frictional force, other shapes can be used. For example, it can also be composed of a plurality of rod-like projections, a plurality of plate-like projections, etc. (none of which are shown).
Moreover, in the said Example, although the inner window 53 of the hopper 50 was opened by reverse rotation of an auger and the inner window 53 was closed by forward rotation, it can also comprise reverse. In this case, the attachment positions of the stoppers 70 and 70a are changed corresponding to the rotation direction (not shown).
[0058]
【The invention's effect】
In this invention, the sampling device is adjusted in advance according to the length from the bottom of the hole to the sampling position of the filling material, and the sampling device is pressed against the bottom of the underground hole to open the opening of the sealed container, thereby sealing the filling material. Since it is taken into the container, the underground filling can be reliably collected in an arbitrary section. In addition, since the opening of the sealed container is not opened until reaching a preset collection position, there is no possibility that a filler in another section is mixed in the sealed container until reaching a desired collection section or after collection.
[0059]
Therefore, since the packing at the current position can be collected as it is, there is an effect that the solidification strength and other properties of the packing can be accurately grasped.
[Brief description of the drawings]
1A is a front view of a sampling device according to Embodiment 1 of the present invention, FIG. 1B is a front view showing a state where a hopper is sealed, FIG. 1B is a front view showing a state where an inner window of the hopper is opened, and FIG. Sectional drawing in the AA line of a), (d) is sectional drawing in the BB line of (b).
FIG. 2 is an enlarged front view of a hopper and shows a state where a hatch is opened.
FIGS. 3A to 3D are longitudinal sectional views with a part omitted illustrating a sampling method according to Embodiment 1 of the present invention. FIGS.
FIG. 4 is a front view of the collection device according to the first embodiment of the present invention, showing a state in which the hatch of the hopper is opened and the collected material is taken out.
FIG. 5 shows a state in which auxiliary legs are attached in the sampling device according to Embodiment 1 of the present invention.
6A is a front view, FIG. 6B is a plan view, and FIG. 6C is a bottom view of the sampling apparatus according to Embodiment 2 of the present invention.
7A and 7B are enlarged cross-sectional views taken along line CC in FIG. 6A, in which FIG. 7A shows a state in which the inner window is opened, and FIG. 7B shows a state in which the inner window is closed.
FIGS. 8A to 8D are longitudinal sectional views with a part omitted illustrating a sampling method according to Embodiment 2 of the present invention. FIGS.
FIG. 9 is a front view of a collection device according to Embodiment 2 of the present invention, showing a state in which a collection is taken out from a hopper.
FIG. 10 is a front view of a sampling apparatus according to Embodiment 2 of the present invention, showing a state where auxiliary legs are attached.
[Explanation of symbols]
1 Hopper 2 Top plate (hopper)
3 Side plate (hopper)
4 Side plate (hopper)
5 Inner window (hopper)
7 Take-out (hopper)
8 Hatch (hopper)
10 Connection shaft 11 Hollow part (connection shaft)
12 Connection part (connection shaft)
13 Discharge valve (connecting shaft)
14 Stopper (connection shaft)
15 Spring 17 Outer frame 19 Outer plate (outer frame)
20 Outer plate (outer frame)
21 Top plate (outer frame)
22 Bottom plate (outer frame)
23 Outside window (outer frame)
26 Extraction device 28 Pile hole 29 Expanded bottom (pile hole)
30 Shaft (Pile hole)
33 Hole bottom (pile hole)
35 Ground 37 Rod 41 Auxiliary leg 50 Hopper 51 Bottom plate (hopper)
52 Side Wall (Hopper)
53 Inside window (hopper)
55 Exit (Hopper)
56 Tank (hopper)
60 Hole bottom pressing part (hopper)
65 Outer cylinder 67 Side wall (outer cylinder)
68 Outside window (outer cylinder)
69 Protruding piece (outer cylinder)
70, 70a Stopper 72 Collection device 74 Auxiliary leg

Claims

A method for collecting the filling in the underground hole, characterized in that it is configured as follows.
(1) Adjust the sampling device according to the length from the hole bottom to the packing sampling position in advance,
(2) Connect the lower end of the auger rod to the sampling device having the sealed container with the opening closed in a non-pressed state to the sampling position of the filling in the underground hole, and lower it so that the bottom of the underground hole Fixing the sampling device on the supporting ground,
(3) By pressing the sampling device with the auger, pressing the sampling device to the support ground at the bottom of the underground hole,
(4) By pressing the sampling device, the opening of the sealed container is opened, the filling is taken into the sealed container, and then the auger is released to close the opening and remove the filling. Sealed
(5) Instead of (4), by rotating the sampling device in one direction while pressing the sampling device, the opening of the sealed container is opened, the filling material is taken into the sealed container, and then the auger is pressed and the other Sealing the filling by closing the opening by rotating in the direction,
(6) After completing the step (4) or (5), the sampling device is pulled up.

The method for collecting underground filler according to claim 1, wherein the discharge corresponding to the filler collected from the discharge port of the collection device is discharged.

An inner window is formed in a hopper that accommodates the collected material, and an outer frame that closes the inner window and slides up and down to expose the inner window is fitted to the hopper, A bottom-bottom pressing portion whose length is adjustable at the lower end of the hopper, a connecting portion of a rod is formed at the upper end portion of the hopper, and the window inside the opening in a non-pressing state between the hopper and the outer frame A sampling device comprising a spring biased so as to close the opening, wherein the spring is fixed to the bottom of the hole and pressed against the support ground so as to open the window in the opening. An underground sampling device characterized by being formed.

An opening inner window is formed in a hopper that accommodates the collected material, and an outer cylinder that closes the opening inner window and rotates and slides to expose the opening inner window is fitted into the hopper. An adjustable bottom hole pressing portion is formed at the lower end, a connecting portion of a rod is formed at the upper end portion of the outer cylinder, and an opening inner window closing position and an opening inner window exposure position are formed on the hopper or the outer cylinder. An underground collecting material collecting apparatus, comprising a stopper for restricting the rotation of the outer cylinder.

5. The underground filling material collecting apparatus according to claim 3, further comprising a discharge port for replenishment supplied from the ground.

The underground filling material collecting device according to claim 3 or 4, wherein a collected material outlet is provided at a lower end portion of the hopper.

4. The underground filling material collecting apparatus according to claim 3, wherein the hopper is removable from the outer frame, and a lubricant is interposed between the outer surface of the hopper and the inner surface of the outer frame.

5. The underground filling material collecting apparatus according to claim 4, wherein a lubricant is interposed between the outer surface of the hopper and the inner surface of the outer cylinder, and an inlet for the lubricant is provided on the top plate of the outer cylinder.